The Vikings front office has become very sensitive about bringing back running back Adrian Peterson following his prolonged legal saga, writes Jason La Canfora of CBSSports.com, who adds that there are “no guarantees” the club would welcome him back if he’s reinstated by the NFL. Citing multiple sources with knowledge of the situation, La Canfora writes that the Vikings harbor “serious concerns” about Peterson’s physical and mental state — while the running back accepted a no-contest plea, the team isn’t sure he recognized the seriousness of the charges he was facing. La Canfora also hears from sources that Peterson isn’t currently in game shape.

As we wait to see what the NFL and the Vikings decide to do with the former All-Pro running back, let’s check in on several other items from around the league….

According to Jason La Canfora of CBSSports.com (via Twitter), Carson Palmer‘s new extension features $10MM in guaranteed signing and roster bonuses, as well as a $10.5MM salary for 2015 that’s guaranteed for injury. So even though he may have torn his ACL today, the Cardinals quarterback has secured $20.5MM in guarantees over the course of this year and next year.

Giants running back Michael Cox was in a wheelchair with what appeared to be a serious leg injury following the team’s loss in Seattle today, according to Dan Graziano of ESPN.com, who tweets that the club is likely to add a replacement running back this week. The Giants confirmed tonight that Cox fractured the lower part of his left leg, tweets Ralph Vacchiano of the New York Daily News.

Lions offensive lineman Larry Warford doesn’t have an ACL injury, a source tells Jason Cole of Bleacher Report (Twitter link). Warford will undergo further tests to determine the severity of his knee injury.